On 09/06/2016 02:52 PM, Simon Glass wrote:
Hi Alex,
On 6 September 2016 at 03:09, Alexander Graf <ag...@suse.de> wrote:
On 09/06/2016 03:05 AM, Simon Glass wrote:
Hi Alex,
On 5 September 2016 at 04:51, Alexander Graf <ag...@suse.de> wrote:
On 08/19/2016 08:45 AM, Michal Simek wrote:
On 16.8.2016 20:39, Alexander Graf wrote:
Hi Michal,
I just tried to run the latest u-boot master + a few patches to
implement
generic PSCI RTS support on zynqmp and got this:
e
U-Boot 2016.09-rc1-00453-ga0592f1 (Aug 16 2016 - 20:27:40 +0200) Xilinx
ZynqMP ZCU102
I2C: ready
DRAM: 4 GiB
EL Level: EL2
MMC: sdhci@ff170000: 0
Using default environment
In: serial@ff000000
Out: serial@ff000000
Err: serial@ff000000
Bootmode: SD_MODE1
SCSI: SATA link 0 timeout.
Target spinup took 0 ms.
AHCI 0001.0301 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
flags: 64bit ncq pm clo only pmp fbss pio slum part ccc apst
scanning bus for devices...
"Synchronous Abort" handler, esr 0x96000004
ELR: 7ff42d20
LR: 7ff3ff10
x0 : 0000000000000000 x1 : 0000000000000000
x2 : 0000000000000001 x3 : 000000007df1aa80
x4 : aaaaaaaaaaaaaaaa x5 : 0000000000000001
x6 : 0000000000000200 x7 : 0000000000000004
x8 : 000000007ff9f800 x9 : 0000000000000008
x10: 000000007ff9f8f0 x11: 0000000000000000
x12: 00000000ffffffff x13: 00000000ffffffff
x14: 000000007ff8242f x15: 000000007ff82435
x16: 000000007ff84388 x17: 000000007ff84388
x18: 000000007df1ade8 x19: 000000007df1aa80
x20: 000000007ff92cb8 x21: 000000007ff9f800
x22: 000000007ff9f000 x23: 0000000000000078
x24: 000000007ff9f8f0 x25: 0000000000000000
x26: 000000007ff9f800 x27: 000000007ff9f000
x28: 000000007ff9fb00 x29: 000000007df1aca0
Resetting CPU ...
resetting …
Is this a known problem?
Is this issue with usb?
I have usb off on zcu102 that's why if this usb issue
I am not aware about it.
After a bit of digging, turns out it's CONFIG_BLK. If I disable that
things
work again (albeit without mmc access, since that one requires CONFIG_BLK
now).
I don't have a zynqmp device, so cannot test with that unfortunately.
Well, QEMU supports zcu102 emulation in the latest version, so you could use
that to emulate the board:
$ qemu-system-aarch64 -M xlnx-zcu102 -kernel u-boot.elf -nographic -m 2G
-drive file=u-boot,id=d,if=none -device ide-drive,drive=d,bus=ide.0
However, I don't see the data abort with the emulated device, only with
actual hardware. Probably because real hardware is more upset about reading
from address 0 ;). But I can provoke the oops even in QEMU if I unmap the
first page from the memory map using the patch below.
The oops happens in blk_dread because block_dev->bdev is NULL.
Yes, this field really should be removed. As the comment says it's a
hangover from pre-CONFIG_BLK where functions use a struct blk_dev * to
specify the block device instead of a struct udevice *. It came up
recently on a patch you sent also which is why I am so against using
it.
That said, I'm not sure why it is unset. The path should be:
sdhci_bind()
mmc_bind()
blk_create_devicef()
blk_create_device()
which sets:
desc->bdev = dev;
[snip]
The special case about ZynqMP is that it has 2 storage backends, one
that uses DM (the sdhc controller) and one that isn't converted to DM
(the AHCI controller). I guess something goes wrong with the latter.
Alex
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